1063684721 has 8 divisors (see below), whose sum is σ = 1160913600. Its totient is φ = 966544240.

The previous prime is 1063684693. The next prime is 1063684723. The reversal of 1063684721 is 1274863601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1063684721 - 2¹⁴ = 1063668337 is a prime.

It is a super-2 number, since 2×1063684721² = 2262850371377695682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1063684723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4460 + ... + 46338.

It is an arithmetic number, because the mean of its divisors is an integer number (145114200).

Almost surely, 2^1063684721 is an apocalyptic number.

1063684721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1063684721 is a deficient number, since it is larger than the sum of its proper divisors (97228879).

1063684721 is a wasteful number, since it uses less digits than its factorization.

1063684721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44199.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1063684721 is about 32614.1797535980. The cubic root of 1063684721 is about 1020.7928991135.

The spelling of 1063684721 in words is "one billion, sixty-three million, six hundred eighty-four thousand, seven hundred twenty-one".